我有一个的LinearLayout 在滚动型，有安卓layout_height =FILL_PARENT ，但它并没有扩展到滚动型的整个高度。我的布局看起来是这样的：

I have a LinearLayout inside a ScrollView that has android:layout_height="fill_parent", but it doesn't expand to the full height of the ScrollView. My layout looks something like:

level    layout    layout_width    layout_height
1    LinearLayout    fill_parent    fill_parent
2    LinearLayout    fill_parent    wrap_content
3    (some irrelevant stuff)
2    ScrollView      fill_parent    fill_parent <-- this expands full height
3    LinearLayout    fill_parent    fill_parent <-- this does not (has orientation=vertical)
(following stuff probably are irrelevant, but just to be sure:)
4    TextView        fill_parent    fill_parent
4    LinearLayout    fill_parent    wrap_content

我可以看到的LinearLayout 不展开的全高的滚动型因为Eclipse在 Android的布局编辑器，如果我选择了滚动型（在大纲面板），它是用红色边框突出，填补了屏幕的底部，但是当我选择的LinearLayout 其亮点并不扩展到屏幕的底部。我怎样才能得到它这样做？

I can see that the LinearLayout doesn't expand the full height of the ScrollView because in Eclipse in Android Layout Editor, if I select the ScrollView (in the Outline panel) it is highlighted with a red border that fills the screen to the bottom but when I select the LinearLayout its highlight doesn't expand to the bottom of the screen. How can I get it to do so?

我想达到的效果是有一些文本和它下面的按钮（在的LinearLayout 4级有只是一个按钮）。该文本可以是大到需要一个滚动条，在这种情况下，我希望用户有才能看到该按钮向下滚动。 ，我想的LinearLayout 包含按钮粘到屏幕的底部。

The effect I'm trying to achieve is to have some text and a button below it (inside the LinearLayout in level 4 there's just a button). The text can be big enough to need a scrollbar, in which case I want the user to have to scroll down in order to see the button. In case the text is not big enough for a scroll bar, I want the LinearLayout containing the button to stick to the bottom of the screen.

起初我还以为我不应该张贴完整的XML，因为它通常是一个回合下来看到一个问题code一大块。然而，现在看来，这可能是必要的，所以这里的完整布局。

At first I thought I shouldn't post the full XML because it's usually a turn-down to see a huge chunk of code in a question. However, it seems it might be necessary, so here's the full layout.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:id="@+id/video_layout"
        android:focusable="true"
        style="@style/VideoLayout">
        <FrameLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:foreground="@android:drawable/ic_media_play"
            android:foregroundGravity="center">
            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/video_thumb"
                android:padding="5dip"
                android:background="#454545"/>
        </FrameLayout>
        <TextView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:focusable="true"
            style="@style/VideoTitle"
            android:id="@+id/video_title"
            android:layout_gravity="center"
            android:layout_weight="1"/>
    </LinearLayout>
    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1">
        <!-- this ScrollView expands the full height of the screen.
             However, the next LinearLayout does not expand the full height of the ScrollView -->
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="1"
            android:layout_gravity="fill"
            android:orientation="vertical"
            android:id="@+id/info_layout">
            <TextView
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:id="@+id/info_body"
                style="@style/InfoText"/>
            <LinearLayout
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                style="@android:style/ButtonBar">
                    <Button
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:layout_weight="1"
                        android:text="@string/button_readmore"
                        android:id="@+id/btn_read_more"/>
            </LinearLayout>
        </LinearLayout>
    </ScrollView>
</LinearLayout>

目前，我已经使出安卓layout_gravity =底部上的问题的LinearLayout ，这使按钮粘在屏幕的底部不管。但是，这也使得文本粘在屏幕的底部，这不正是我后。

At the moment I have resorted to android:layout_gravity="bottom" on the problematic LinearLayout, which makes the button stick to the bottom of the screen no matter what. But that also makes the text stick to the bottom of the screen, which is not exactly what I was after.

更新：刮的是，安卓layout_gravity =底部使滚动型无力，好，滚动。其他的想法？

Update: scratch that, android:layout_gravity="bottom" makes the ScrollView unable to, well, scroll. Other ideas?

推荐答案

找到了解决自己到底。问题是不与的LinearLayout ，而在滚动型（似乎不可思议，考虑到一个事实，即滚动型 是扩张，而的LinearLayout 不是）。

Found the solution myself in the end. The problem was not with the LinearLayout, but with the ScrollView (seems weird, considering the fact that the ScrollView was expanding, while the LinearLayout wasn't).

的解决方案是使用机器人：fillViewport =真正的在滚动型

The solution was to use android:fillViewport="true" on the ScrollView.